/usr/lib/GNUstep/Applications/NSPanelTest.app/Resources is in gnustep-examples 1:1.4.0-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/GNUstep/Applications/NSPanelTest.app/../../../../share/GNUstep/NSPanelTest.app